Interleave Two Words

Easy

You are given two strings, first and second. Build a single string by taking letters in turns: the first letter of first, the first letter of second, the second letter of first, the second letter of second, and so on. Once one string runs out, append whatever is left of the other one unchanged. Return the resulting string.

Example 1

first="cat", second="dog" → 'cdaotg'

Taking turns: c, d, a, o, t, g gives cdaotg.

Example 2

first="hi", second="there" → 'htihere'

After h, t, i, h the first word runs out, so the rest of the second, ere, is appended as is: hthiere.

Example 3

first="sun", second="" → 'sun'

Constraints

0 ≤ len(first), len(second) ≤ 100
Both strings consist of lowercase English letters

Have you seen this problem in a real interview?

Solved by0

Tried by0

Submissions0

Acceptance—

Topics

Two Pointers String

Similar problems

Where the Fragment Starts Easy Mirror Phrase Check Easy Same When Flipped Easy Flip the Characters in Place Easy Mirror the Vowels Easy

Input

first="cat", second="dog"

Expected

'cdaotg'

Run checks the first 3 tests in your browser. Submit checks all 92 tests on the server, hidden ones included.